used to的用法小结.doc

文档介绍：“过去常常做某事”,将过去和现在对比,暗示现在不做了。to为动词不定式符号,后接动词原形。如:Heusedtogotoschoolatsixo'。+usedn'+didn':。→Heusedn'putergamesallday.=Hedidn'。【注意】usedn't=(1)Used+主语+todo…?回答:Yes,./No,':TomusedtowatchTV.→UsedTomtowatchTV?Yes,heusedto./No,heusedn'tto.(2)Did+主语+usetodo…?回答:Yes,./No,':Iusedtodohomeworkafterschool.→Didyouusetodohomeworkafterschool?Yes,Idid./No,Ididn',类似于否定句形式。如:—TheyusedtoseeEnglishmoviesonSundays,usedn'tthey?/didn'tthey?—Yes,theyusedto./No,theyusedn',theydid./No,theydidn',表示“过去常有”。如:。(doing)(做)某事;……做某事;;beusedfor(doing);beusedby被……所用。语法精练Ⅰ.用括号内所给单词的适当形式填空。(play)ping-'musedto(get)(make)desks,chairs,(use)tobeshort?(use)inbothcitiesandtowns.Ⅱ.根据汉语提示完成句子,每空一词。(以前是)(以前有)anol